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Map: dark-map toggle (invert tiles only), no repacking

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A moon button on the recording, track-detail and roads maps inverts ONLY the
tile layer: body.dark-map applies `invert(1) hue-rotate(180deg) brightness(1.5)`
to .leaflet-tile-pane, so the track/route/roads/puck overlays keep their colours.
Works the same on offline (tiles_*.db) and online tiles — no keys, quotas or
tile repacking. The choice persists in localStorage (baldav_dark_map).

Chosen after ruling out dark tile providers (CARTO/Thunderforest/2GIS/Yandex —
keys/quotas/ToS/projection/RF-reachability) and the transport style (inverts
badly in dense city); plain OSM inverted looks good city and countryside.

Verified on device: filter on the tile pane only, overlay pane filter none,
button active and remembered.
This commit is contained in:
4aiman 2026-09-09 13:33:05 +03:00
commit 5c23c4dda4
5 changed files with 90 additions and 0 deletions
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frontend/css/styles.css
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@ -1145,6 +1145,10 @@ select {
.rec-roads-toggle { right: 8px; bottom: 124px; }
.rec-mode-btn { right: 8px; bottom: 162px; font-size: 11px; }
.rec-route-toggle { right: 8px; bottom: 200px; }
.rec-dark-toggle { right: 8px; bottom: 238px; }
/* Dark map: invert ONLY the tile layer (overlays — track, route, roads, puck — keep
their colours). User-tuned filter on OSM standard tiles. Applies to every Leaflet map. */
body.dark-map .leaflet-tile-pane { filter: invert(1) hue-rotate(180deg) brightness(1.5); }
/* Always-on compass needle: red half = North, grey = South. Rotates to point to real north.
Top-RIGHT (zoom controls are top-left), below the status-bar safe area. */
/* Position/direction puck (SVG divIcon) — no default leaflet-div-icon box. */